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      Melodies of Popular Songs Have Gotten Simpler Over Time

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      “Well, we’re all in the mood for a melody,” Billy Joel crooned in “Piano Man,” his iconic 1973 barroom ballad. That may have been true enough when Mr. Joel wore a younger man’s clothes, but a new study conducted by computational musicologists at Queen Mary University of London has found that vocal melodies in popular music have become much less complex over time.The study, published on Thursday in the journal Scientific Reports, used mathematical models and algorithms to pinpoint three “melodic revolutions” — in 1975, 1996 and 2000 — that brought increasing simplicity to the two main components of melody: rhythm, or the pattern of sounds and silences in a piece of music, and pitch, the measure of how high or low the notes are.The study looked at the top five Billboard songs every year from 1950 to 2023. Both rhythm and pitch became steadily less complex over that period, the study found. “Conservatively, they have both decreased by 30 percent,” said Madeline Hamilton, a graduate student at Queen Mary University of London who led the research.The 1975 hit “Love Will Keep Us Together” by Captain & Tennille contains a lot of unexpected notes and rhythmic complexity.“Breathe” by Faith Hill, the top song of 2000, has no accidentals, lots of repetition and straightforward rhythms.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Alaska’s Juneau Ice Field Is Melting at an ‘Incredibly Worrying’ Pace, Scientists Say

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      The speed of decline in the Juneau Ice Field, an expanse of 1,050 interconnected glaciers, has doubled in recent decades, scientists discovered.One of North America’s largest areas of interconnected glaciers is melting twice as quickly as it did before 2010, a team of scientists said Tuesday, in what they called an “incredibly worrying” sign that land ice in many places could disappear even sooner than previously thought.The Juneau Ice Field, which sprawls across the Coast Mountains of Alaska and British Columbia, lost 1.4 cubic miles of ice a year between 2010 and 2020, the researchers estimated. That’s a sharp acceleration from the decades before, and even sharper when compared with the mid-20th century or earlier, the scientists said. All told, the ice field has shed a quarter of its volume since the late 18th century, which was part of a period of glacial expansion known as the Little Ice Age.As societies add more and more planet-warming carbon dioxide to the atmosphere, glaciers in many areas could cross tipping points beyond which their melting speeds up rapidly, said Bethan Davies, a glaciologist at Newcastle University in England who led the new research.“If we reduce carbon, then we have more hope of retaining these wonderful ice masses,” Dr. Davies said. “The more carbon we put in, the more we risk irreversible, complete removal of them.”The scientists’ findings were published on Tuesday in the journal Nature Communications.The fate of Alaska’s ice matters tremendously for the world. In no other region of the planet are melting glaciers predicted to contribute more to global sea-level rise this century.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Robots Get a Fleshy Face (and a Smile) in New Research

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      Researchers at the University of Tokyo published findings on a method of attaching artificial skin to robot faces to protect machinery and mimic human expressiveness.Japanese researchers used living skin cells to make a flexible 3-D facial mold for a robot.via Shoji TakeuchiEngineers in Japan are trying to get robots to imitate that particularly human expression — the smile.They have created a face mask from human skin cells and attached it to robots with a novel technique that conceals the binding and is flexible enough to turn down into a grimace or up into a squishy smile.The effect is something between Hannibal Lecter’s terrifying mask and the Claymation figure Gumby.But scientists say the prototypes pave the way for more sophisticated robots, with an outward layer both elastic and durable enough to protect the machine while making it appear more human.Beyond expressiveness, the “skin equivalent,” as the researchers call it, which is made from living skin cells in a lab, can scar and burn and also self-heal, according to a study published June 25 in the journal Cell Reports Physical Science.“Human-like faces and expressions improve communication and empathy in human-robot interactions, making robots more effective in health care, service and companionship roles,” Shoji Takeuchi, a professor at the University of Tokyo and the study’s lead researcher, said in an email.The research comes as robots are becoming more ubiquitous on factory floors.There were 3.9 million industrial robots working on auto and electronics assembly lines and other work settings in 2022, according to the International Federation of Robotics.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      A Global Push Fixed the Ozone Hole. Satellites Could Threaten It.

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      A sharp increase in hardware orbiting Earth could mean more harmful metals lingering in the atmosphere, according to a new study.Low-Earth orbit, a layer of superhighway that wraps around Earth’s thermosphere some 200 to 600 miles above our heads, is newly congested.Yet no one knows how the vast increase in satellites orbiting Earth will affect the atmosphere, and therefore life down below. With the rush to send up more and more satellites, a new study proposes that the hole in the ozone layer, a problem scientists thought they had solved decades ago, could make a comeback.“Up until a few years ago, this was not a research area at all,” Martin Ross, an atmospheric scientist at Aerospace Corporation, said of the study, which looked at how a potential increase in man-made metal particles could eat away at Earth’s protective layer.Ever since Sputnik, the first man-made space satellite, was launched in 1957, scientists have thought that when satellites re-enter our atmosphere at the end of their lives, their vaporization has little impact. But new satellites — much more advanced, but also smaller, cheaper and more disposable than previous satellites — have a turnover that resembles fast fashion, said the lead author of the study, José Pedro Ferreira, a doctoral candidate in astronautical engineering at the University of Southern California.Almost 20 percent of all satellites ever launched have re-entered Earth’s atmosphere in the last half-decade, burning up in superfast, superhot blazes.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      How A.I. Imitates Restaurant Reviews

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      A new study showed people real restaurant reviews and ones produced by A.I. They couldn’t tell the difference.The White Clam Pizza at Frank Pepe Pizzeria Napoletana in New Haven, Conn., is a revelation. The crust, kissed by the intense heat of the coal-fired oven, achieves a perfect balance of crispness and chew. Topped with freshly shucked clams, garlic, oregano and a dusting of grated cheese, it is a testament to the magic that simple, high-quality ingredients can conjure.Sound like me? It’s not. The entire paragraph, except the pizzeria’s name and the city, was generated by GPT-4 in response to a simple prompt asking for a restaurant critique in the style of Pete Wells.I have a few quibbles. I would never pronounce any food a revelation, or describe heat as a kiss. I don’t believe in magic, and rarely call anything perfect without using “nearly” or some other hedge. But these lazy descriptors are so common in food writing that I imagine many readers barely notice them. I’m unusually attuned to them because whenever I commit a cliché in my copy, I get boxed on the ears by my editor.He wouldn’t be fooled by the counterfeit Pete. Neither would I. But as much as it pains me to admit, I’d guess that many people would say it’s a four-star fake.The person responsible for Phony Me is Balazs Kovacs, a professor of organizational behavior at Yale School of Management. In a recent study, he fed a large batch of Yelp reviews to GPT-4, the technology behind ChatGPT, and asked it to imitate them. His test subjects — people — could not tell the difference between genuine reviews and those churned out by artificial intelligence. In fact, they were more likely to think the A.I. reviews were real. (The phenomenon of computer-generated fakes that are more convincing than the real thing is so well known that there’s a name for it: A.I. hyperrealism.)Dr. Kovacs’s study belongs to a growing body of research suggesting that the latest versions of generative A.I. can pass the Turing test, a scientifically fuzzy but culturally resonant standard. When a computer can dupe us into believing that language it spits out was written by a human, we say it has passed the Turing test.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Gilead Shot Provides Total Protection From HIV in Trial of Young African Women

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      An injection given just twice a year could herald a breakthrough in protecting the population that has the highest infection rates.Researchers and activists in the trenches of the long fight against H.I.V. got a rare piece of exciting news this week: Results from a large clinical trial in Africa showed that a twice-yearly injection of a new antiviral drug gave young women total protection from the virus.“I got cold shivers,” said Dr. Linda-Gail Bekker, an investigator in the trial of the drug, lenacapavir, describing the startling sight of a line of zeros in the data column for new infections. “After all our years of sadness, particularly over vaccines, this truly is surreal.”Yvette Raphael, the leader of a group called Advocacy for Prevention of H.I.V. and AIDS in South Africa, said it was “the best news ever.”The randomized controlled trial, called Purpose 1, was conducted in Uganda and South Africa. It tested whether the every-six-months injection of lenacapavir, made by Gilead Sciences, would provide better protection against H.I.V. infection than two other drugs in wide use in high-income countries, both daily pills.The results were so convincing that the trial was halted early at the recommendation of the independent data review committee, which said all participants should be offered the injection because it clearly provided superior protection against the virus.None of the 2,134 women in the arm of the trial who received lenacapavir contracted H.I.V. By comparison, 16 of the 1,068 women (or 1.5 percent) who took Truvada, a daily pill that has been available for more than a decade, and 39 of 2,136 women (1.8 percent) who received a newer daily pill called Descovy were infected.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Akira Endo, Scholar of Statins That Reduce Heart Disease, Dies at 90

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      The Japanese biochemist found in the 1970s that cholesterol-lowering drugs lowered the LDL, or “bad” cholesterol, level in the blood.Akira Endo, a Japanese biochemist whose research on fungi helped to lay the groundwork for widely prescribed drugs that lower a type of cholesterol that contributes to heart disease, died on June 5. He was 90.Chiba Kazuhiro, the president of Tokyo University of Agriculture and Technology, where Dr. Endo was a professor emeritus, confirmed the death in a statement. The statement did not give a cause or say where he died.Cholesterol, mostly made in the liver, has important functions in the body. It is also a major contributor to coronary artery disease, a leading cause of death in the United States, Japan and many other countries.In the early 1970s, Dr. Endo grew fungi in an effort to find a natural substance that could block a crucial enzyme that is part of the production of cholesterol. Some scientists worried that doing so might threaten cholesterol’s positive functions.But by 1980, Dr. Endo’s team had found that a cholesterol-lowering drug, or statin, lowered the LDL, or “bad” cholesterol level, in the blood. And by 1987, after other researchers in the field had published additional research on statins, Merck was manufacturing the first licensed statin.Such drugs have proven effective in reducing the risk for cardiovascular disease, and millions of people in the United States and beyond now take them for high levels of LDL.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

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      Have Wine for Breakfast, Put On a 51-Pound Suit and Get to the Battlefield

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      One by one, Greek soldiers, bellies full from a breakfast of red wine and dry bread, armed and clad themselves in a bulky, buglike suit of armor as they prepared for battle.They aimed their spears at wooden targets, and their chariot was connected to a treadmill motor, but for 11 hours, these elite soldiers from the Hellenic Armed Forces pretended to fight as if it was the 15th century B.C.They had been recruited for a study to determine if the Dendra panoply, a suit of armor from 3,500 years ago considered to be one of the oldest known from the Bronze Age in Europe, could be worn in battle. Or if it was only ceremonial, as some scholars have previously argued.The soldiers wore a replica of the suit, and scientists tracked their blood-glucose levels, heart rates and other physiological measures, finding that the men’s bodies could handle the strain of the armor, according to a paper published in the journal PLOS One on May 22.Andreas Flouris, the lead author of the paper and the director of the FAME Lab at the University of Thessaly in Volos, Greece, where the battles took place, said that the simulated combat, as well as other research components, showed that the armor would have been “a very advanced piece of military technology” at the time.“If you’re carrying a piece of wood or a stone or maybe something with a bit of bronze in the front, like a spear, somebody wearing this armor looks like a giant robot in front of you,” said Dr. Flouris, a professor of physiology at the University of Thessaly.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More